Allergen, Finch Feathers, IgE, Serum (FINCH)

Test Code: ALFNHSO

Overview
Ordering
Specimen
Performing
Clinical/Interpretive
Contacts
Coding

Synonyms/Keywords

Brambling Feathers
Bunting Feathers
Cardinal Feathers
Crossbill Feathers
Feathers, finch
Goldfinch Feathers
Grosbeak Feathers
Junco Feathers
Linnet Feathers
Lonchura domestrica
Siskin Feathers
Sparrow Feathers
Towhee Feathers

Useful For

Establishing the diagnosis of an allergy to finch feathers

Defining the allergen responsible for eliciting signs and symptoms

Identifying allergens:

- Responsible for allergic disease and/or anaphylactic episode

- To confirm sensitization prior to beginning immunotherapy

- To investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens

Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists, or in patients in whom the medical management does not depend upon identification of allergen specificity.

Specimen Requirements

Specimen Type	Preferred Container/Tube	Acceptable Container/Tube	Specimen Volume	Specimen Minimum Volume (allows for 1 repeat)	Pediatric Minimum Volume (no repeat)
Serum	Serum Separator Tube (SST)	Red Top Tube (RTT)	0.5 mL for every 5 allergens requested	0.3 mL

Collection Processing Instructions

For 1 allergen: 0.3 mL; For more than 1 allergen: (0.05 mL x number of allergens) + 0.25 mL dead space

Specimen Stability Information

Specimen Type	Temperature	Time
Serum	Refrigerated (preferred)	14 days
Serum	Frozen	90 days

Performing Laboratory Information

Performing Location	Day(s) Test Performed	Report Available	Methodology/Instrumentation
Mayo Clinic Laboratories	Monday through Friday	1 to 3 days	Fluorescence Enzyme Immunoassay (FEIA)

Reference Lab

Mayo Clinic Laboratories

Reference Range Information

Performing Location

Reference Range

Mayo Clinic Laboratories

Class	IgE kU/L	Interpretation
0	<0.10	Negative
0/1	0.10-0.34	Borderline/equivocal
1	0.35-0.69	Equivocal
2	0.70-3.49	Positive
3	3.50-17.4	Positive
4	17.5-49.9	Strongly positive
5	50.0-99.9	Strongly positive
6	> or =100	Strongly positive

Reference values apply to all ages.

Interpretation

Detection of IgE antibodies in serum (Class 1 or greater) indicates an increased likelihood of allergic disease as opposed to other etiologies and defines the allergens that may be responsible for eliciting signs and symptoms.

The level of IgE antibodies in serum varies directly with the concentration of IgE antibodies expressed as a class score or kU/L.

Outreach CPTs

CPT	Modifier (if needed)	Quantity	Description	Comments
86003		1

Synonyms/Keywords

Ordering Applications

Ordering Application	Description
COM	Allergen, Finch Feathers, IgE, Serum (FINCH)
Cerner	Allergen, Finch Feathers, IgE (FINCH)

If the ordering application you are looking for is not listed, contact your local laboratory for assistance.